Meta SE seems to attract a much higher percentage of low quality, off-topic and spam questions than any other SE/SO site (Meta or Main) that I frequent.

To help keep quality on Meta SE high would it be viable for there to be a minimum reputation set to post here direct e.g. 1K on at least one Main site?

And then to require that all other questions arrive via migration from a per-site Meta?

There seem be some Q&As around like Which meta am I supposed to post on? that suggest discussing/vetting ideas and issues on per-site Metas is sometimes/often preferable to posting here first.